Abstract
Three distinct classes of drugs: dopaminergic agonists (such as D-amphetamine), serotonergic agonists (such as LSD), and glutamatergic antagonists (such as PCP) all induce psychotomimetic states in experimental animals that closely resemble schizophrenia symptoms in humans. Here we implicate a common signaling pathway in mediating these effects. In this pathway, dopamine- and an adenosine 3′,5′-monophosphate (cAMP)–regulated phospho-protein of 32 kilodaltons (DARPP-32) is phosphorylated or dephosphorylated at three sites, in a pattern predicted to cause a synergistic inhibition of protein phosphatase–1 and concomitant regulation of its downstream effector proteins glycogen synthesis kinase–3 (GSK-3), cAMP response element–binding protein (CREB), and c-Fos. In mice with a genetic deletion of DARPP-32 or with point mutations in phosphorylation sites of DARPP-32, the effects of D-amphetamine, LSD, and PCP on two behavioral parameters—sensorimotor gating and repetitive movements—were strongly attenuated.
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- Supported by the Stern Foundation and by NIH grants MH40899 and DA10044 (P.G.). P.S. is supported by a postdoctoral fellowship from Stiftelsen för Internationalisering av högre utbildning och forskning. We thank P. Ingrassia for help with animal breeding; G. L. Snyder J. A. Bibb A. C. Nairn and H. C. Hemmings Jr. for phospho-Thr 34 –DARPP-32 phospho-Thr 75 DARPP-32 phospho-Ser 130 DARPP-32 and DARPP-32 antibodies; and K. Knitkowski and J. Camara for technical assistance.
Dates
Type | When |
---|---|
Created | 21 years, 9 months ago (Nov. 21, 2003, 12:14 a.m.) |
Deposited | 8 months, 2 weeks ago (Dec. 14, 2024, 7:36 a.m.) |
Indexed | 4 weeks ago (Aug. 2, 2025, 12:09 a.m.) |
Issued | 21 years, 9 months ago (Nov. 21, 2003) |
Published | 21 years, 9 months ago (Nov. 21, 2003) |
Published Print | 21 years, 9 months ago (Nov. 21, 2003) |
@article{Svenningsson_2003, title={Diverse Psychotomimetics Act Through a Common Signaling Pathway}, volume={302}, ISSN={1095-9203}, url={http://dx.doi.org/10.1126/science.1089681}, DOI={10.1126/science.1089681}, number={5649}, journal={Science}, publisher={American Association for the Advancement of Science (AAAS)}, author={Svenningsson, Per and Tzavara, Eleni T. and Carruthers, Robert and Rachleff, Ilan and Wattler, Sigrid and Nehls, Michael and McKinzie, David L. and Fienberg, Allen A. and Nomikos, George G. and Greengard, Paul}, year={2003}, month=nov, pages={1412–1415} }